A、A.efficient
B、B.efficiency
C、C.efficiently
D、D.inefficient
答案:A
A、A.efficient
B、B.efficiency
C、C.efficiently
D、D.inefficient
答案:A
A. A.from
B. B.on
C. C.in
D. D.of
A. A.on
B. B.over
C. C.about
D. D.with
A. A.Whoever
B. B.Anyone
C. C.Whom
D. D.Who
A. A.perform
B. B.performance
C. C.performing
D. D.performed